Discussion
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- Question
If log8x = 313 then find the value of x?
Options- A. 25
- B. 32
- C. 37
- D. None of these
- Correct Answer
- 32
- 1. The value of 1log360+1log460+1log560is
Options- A. 0
- B. 1
- C. 5
- D. 60 Discuss
- 2. A fast moving superfast express crosses another pasenger train in 20 seconds. The speed of faster train is 72 km/hr and speeds of slower train is 27 km/h. Also the length of faster ntrain is 100m, then find the length of the slower train if they are moving in the same direction.
Options- A. 100 m
- B. 125 m
- C. 150 m
- D. 175 m Discuss
- 3. If log 64 = 1.8061, then the value of log 16 will be (approx)?
Options- A. 1.9048
- B. 1.2040
- C. 0.9840
- D. 1.4521 Discuss
- 4. If logxl+m-2n = logym+n-2l = logzn+l-2m , then xyz is equal to
Options- A. 0
- B. 1
- C. lmn
- D. 2 Discuss
- 5. Find the logarithm of 144 to the base 23 :
Options- A. 2
- B. 4
- C. 8
- D. None of these Discuss
- 6. What is the number of digits in 333 ? Given that log3 = 0.47712?
Options- A. 12
- B. 13
- C. 14
- D. 15 Discuss
- 7. if logab+logba=loga+b,then
Options- A. a + b = 1
- B. a - b = 1
- C. a = b
- D. ab=1 Discuss
- 8. The least value of the expression 2log10x - logx1100 for x>1 is:
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 9. Solve the equation 122x+1 = 1 ?
Options- A. -1/2
- B. 1/2
- C. 1
- D. -1 Discuss
- 10. For x?N, x>1 , and p=logxx+1 , q=logx+1x+2 then which one of the following is correct?
Options- A. p < q
- B. p = q
- C. p > q
- D. can't be determined Discuss
Logarithm problems
Search Results
Correct Answer: 1
Explanation:
=>
=>
= 1
Correct Answer: 150 m
Explanation:
X=150m
Correct Answer: 1.2040
Explanation:
Given that, log 64 = 1.8061
i.e
--> 3 log 4 = 1.8061
--> log 4 = 0.6020
--> 2 log 4 = 1.2040
Therefore, log 16 = 1.2040
Correct Answer: 1
Correct Answer: 4
Explanation:
Correct Answer: 13
Explanation:
Let =
Then,
= 27 x 0.47712 = 12.88224
Since the characteristic in the resultant value of log x is 12
The number of digits in x is (12 + 1) = 13
Hence the required number of digits in is 13.
Correct Answer: a + b = 1
Explanation:
so, a+b=1
Correct Answer: 4
Explanation:
Hence the least value of is 4
Correct Answer: -1/2
Explanation:
Rewrite equation as
Leads to 2x + 1 = 0
Solve for x : x = -1/2
Correct Answer: p > q
Explanation:
for (k,l) > 0 and k > l
Let k = x+1 and l = x
Therefore,
(x + 1) > x
Therefore,
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